Option A · Keep your carbine tube
Tromix Buffer
$84.99
- Requires a standard 7-inch carbine buffer tube.
- Compatible with FRTs and Full Auto.
- No gunsmithing.
Lima Six Belt Fed Build Kit
This is a BUILD KIT only, and requires additional parts to be added and must be assembled by the user.
See the end of this product description for a complete list of what’s included and what parts must be added. Videos and technical information are available on our discussion forum. Assembly requires basic AR15 gunsmithing tools and a drill.
All Units Ship in 8 – 12 Weeks.
Limited Stock
Please Review Our ITAR and Blemish Polices Prior to Purchase
Price range: $1,999.99 through $2,024.99
The LIMA SIX WILL NOT FUNCTION with a standard AR15 buffer setup. For more information about buffers, click here: https://limasix.com/product/buffer-upgrade-kit-for-lima-six/
Build Kit Includes:
- Upper Receiver
- Top Cover
- Feed Tray
- Feed Lever
- Complete Bolt Carrier Group
- Feed Stud
- Feed Pawl Assembly
- Front & Rear Cartridge Guides
- Cartridge Guide Springs and Pin
- Top Cover Latch Assembly
- Top Cover Hinge Hardware
- Feed Tray Retainer
- Top Cover Set Screw (nylon tipped)
- Modified Bolt Catch
- Buffer Spacer
- Recoil Spring
Parts you must add to complete:
- Barrel
- Handguard (Please see list of compatible handguards)
- Gas Tube
- Gas Block
- Choose ONE of the following:
- Buffer upgrade kit, available here: https://limasix.com/product/buffer-upgrade-kit-for-lima-six/
- An AR10-style buffer (short, 2.5″), H2 minimum weight (semi auto ONLY)
Additional information
| Weight | 4 lbs |
|---|---|
| Dimensions | 12 × 6 × 4 in |
| Barrel Modification Method | Professional Drilling Service ($24.99), Add On a DIY Barrel Drilling Kit ($9.99), None ($0.00) |
Specifications
- 5.56X45mm NATO
- 7075-T6 Upper Receiver and Top Cover, Type III Hardcoat Anodized
- Billet Machined Hardened 17-4PH Feed Tray
- K-Spec bolt with Dual Ejectors
- 8620 Bolt Carrier, Full Auto Cut
- Tool Steel Belt Feed Components
- Billet Machined Aluminum Charging Handle
The LIMA SIX Platform
Belt Fed Capability.
A Closer Look
Explore the receiver, top cover, and details behind the Lima Six system.
RECEIVER DESIGN
More travel for belt-fed operation.
The stretched receiver provides approximately ¾ inch of additional bolt carrier group travel compared with a standard AR-15. That extra travel helps the system pull cartridges free from the belt links, supporting reliable feeding in the Lima Six platform.
FEED COMPONENTS
M249 feed pawls.
The Lima Six incorporates M249 feed pawls into its belt-feed system, bringing established components into a platform built around the AR-15.
FEED TRAY
Billet machined. Hardened 17-4PH.
The top-loading feed tray is machined from billet 17-4PH stainless steel and hardened. Opening the top cover provides direct access to the tray for belt loading.
CHARGING HANDLE
Reciprocating. Removable for cleaning.
The charging handle reciprocates with the bolt carrier group and is retained by two hex screws. Its removable design allows access for cleaning and maintenance.
TOP COVER
Adjustable support for your optic.
The adjustable top cover helps maintain a secure optic mounting platform and hold zero. Adjustable hinge tension provides added support for heavier optics.
IN THE BOX
What’s included
- Complete upper receiver
- Modified bolt catch
- Buffer spacer
- Recoil spring
PLAN YOUR SETUP
Compatibility & requirements
- Compatible with Standard AR-15 Lowers
- Requires a replacement bolt catch
Requires a specific buffer setup.
BEFORE YOU ORDER
A few things to know.
Quick answers, with detailed platform information available in Tech Info.
Can I use a standard AR-15 buffer setup?
No. Lima Six uppers require a specific buffer setup. Review the complete buffer requirements in our Tech Info section before ordering.
What comes with the complete upper?
Each complete upper includes the assembled upper receiver, a modified bolt catch, a buffer spacer, and a recoil spring. Check the product listing for the full list of included components.
What comes with a build kit?
The Build Kit includes an upper receiver, top cover, feed tray, feed lever, complete bolt carrier group, feed stud, feed pawl assembly, front and rear cartridge guides, cartridge guide springs and pin, top cover latch assembly, top cover hinge hardware, feed tray retainer, nylon-tipped top cover set screw, modified bolt catch, buffer spacer, and recoil spring.
Does Lima Six offer service work?
Yes. We offer service work for Lima Six uppers, including inspection and test fire, rebuilds, barrel replacement, and gas-tube replacement. Review the individual service listings for details, requirements, and shipping instructions.
